Temperature-dependent transmission of Candidatus phytoplasma asteris by the vector leafhopper Macrosteles quadripunctulatus Kirschbaum

  • F. Maggi | federico.maggi@sydney.edu.au School of Civil Engineering, University of Sydney, Australia; The ISI Foundation, Turin, Italy.
  • L. Galetto Istituto per la Protezione Sostenibile delle Piante, IPSP, CNR, Turin, Italy.
  • C. Marzachì Istituto per la Protezione Sostenibile delle Piante, IPSP, CNR, Turin, Italy.
  • D. Bosco DISAFA, University of Turin, Italy.

Abstract

A set of experiments was carried out to characterize how temperature affects the spread of chrysanthemum yellows phytoplasma (CYP), a strain of Candidatus Phytoplasma asteris, in Chrysanthemum carinatum plants transmitted by the Macrosteles quadripunctulatus leafhopper. Experiments provided data on CYP latency period in insect and plant host, M. quadripunctulatus adult mortality rate, and epidemics progression in plants under controlled conditions inside climatic chambers. Experiments were conducted at temperatures ranging between 15 and 30°C. Empirical laws for temperature-dependent epidemiological parameters were next derived and used in a dynamical model of the epidemics progression. Experiments showed that CYP epidemics was faster at higher temperatures and the model could replicate these observations with relatively high accuracy (correlation >98.03% and residuals <14.5%). The epidemics spreading rate increased linearly from 0.2 plants infected per day at 15°C to about 0.7 plants per day at 30°C, possibly due to: i) faster CYP multiplication in the host plants and ii) higher frequency of feeding bouts of M. quadripunctulatus at higher temperatures.

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Author Biography

F. Maggi, School of Civil Engineering, University of Sydney, Australia; The ISI Foundation, Turin


Published
2014-10-14
Info
Issue
Section
Ecology
Keywords:
aster yellows, phytoplasma vector, epidemics, phytoplasma, temperature, modeling
Statistics
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How to Cite
Maggi, F., Galetto, L., Marzachì, C., & Bosco, D. (2014). Temperature-dependent transmission of Candidatus phytoplasma asteris by the vector leafhopper Macrosteles quadripunctulatus Kirschbaum. Entomologia, 2(2). https://doi.org/10.4081/entomologia.2014.202